[Issue 12971] DMD inline asm outputs wrong AND instruction

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12971

--- Comment #1 from Orvid King <blah38621 at gmail.com> ---
As a bit more information, this is caused by a missing REX prefix, and also 
applies to OR, XOR, AND, ADD, SUB, and a few other instructions that use 
op-code 0x80 as their (I know there's a name for the set, but I can't remember 
it or find it anywhere :( )

I believe it is also limited to the r8, imm8 version of the op-codes.

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